Nice bit of code to format an xml string

Question

Anyone got a ready made function that will take an XML string and return a correctly indented string?

eg

A

        

Answer 1

I have used Tidy with libtidy from Michael Elsdörfer. It give you heaps of options and you can configure them externally to the application. Also applicable to HTML.

This is some very rough code that I used. Do with it as you please.

function TForm1.DoTidy(const Source: string): string;
var
  Tidy              : TLibTidy;
begin
  if not TidyGlobal.LoadTidyLibrary('libtidy.dll') then
  begin
    //    Application.MessageBox('TidyLib is not available.', 'Error', 16);
    //    exit;
    raise Exception.Create('Cannot load TidyLib.dll');
  end;
  Tidy := TLibTidy.Create(Self);
  try
    Tidy.LoadConfigFile(ExtractFilePath(Application.ExeName) +
      'tidyconfig.txt');
    //    Tidy.Configuration.IndentContent := tsYes;
    //    Tidy.Configuration.IndentSpaces := 5;
    //    Tidy.Configuration.UpperCaseTags := False;
    //    Tidy.Configuration.NumEntities := True;
    //    Tidy.Configuration.AccessibilityCheckLevel := 2;
    //    Tidy.Configuration.InlineTags := 'foo,bar';
    //    Tidy.Configuration.XmlDecl := True;
    //    Tidy.Configuration.XmlTags := True;
    //    Tidy.Configuration.CharEncoding := TidyUTF8;
    //    Tidy.Configuration.WrapLen := 0;
    //    Tidy.SaveConfigFile('tidyconfig.txt');
    Tidy.ParseString(Source);
    Result := Tidy.RunDiagnosticsAndRepair;
  finally
    Tidy.Free;
  end;
end;